James E. Maslar, Wilbur S. Hurst, Terrell A. Vanderah, Igor Levin
The Raman spectra of polycrystalline Cr3O8 and Cr2O5 powders were measured. The powders were prepared by thermal decomposition of CrO3 under flowing oxygen. Their composition was verified with x-ray diffraction. Raman spectra were excited with both 514.5 nm and 647.1 nm radiation. The spectral intensities were corrected for wavelength-dependent instrumental response. Tentative peak descriptions were made by comparison of the Cr3O8 and Cr2O5 spectra with reported spectra of crystalline chromium oxides.